What is the use of oil cake after oil pressing
The oil cake after oil pressing is a by-product produced during oil processing and is usually ignored. However, oil cakes actually have multiple uses and can play an important role from agriculture to industry to food. This article will introduce the use of oil cakes in detail and display relevant data in a structured manner to help readers fully understand the value of this resource.
1. Basic introduction to oil cakes
Oil cakes are solid residues remaining after oil crops (such as soybeans, peanuts, rapeseed, sesame, etc.) are extracted by pressing or leaching. It is rich in nutrients, containing protein, cellulose, minerals, etc., and is a high-value by-product.
| Oil cake type | Main ingredients | Nutritional value |
|---|---|---|
| Soybean oil cake | 40-50% protein, 8-10% cellulose | High protein, suitable for animal feed |
| Peanut oil cake | 45-55% protein, 5-8% fat | Good palatability, used for livestock and poultry feed |
| Rapeseed oil cake | 35-40% protein, 12-15% cellulose | Need to be detoxified and used |
2. The main uses of oil cakes
1. Animal feed
Oil cakes are high-quality animal feed raw materials, especially suitable for livestock, poultry and aquaculture. Its high protein content can effectively supplement the nutrients needed by animals and improve the economics of feed.
| Animal Types | Suitable for oil cakes | Add proportion |
|---|---|---|
| pig | Soybean oil cake, peanut oil cake | 10-20% |
| chicken | Soybean oil cake, rapeseed oil cake | 15-25% |
| fish | Peanut oil cake, sesame oil cake | 20-30% |
2. Organic fertilizers
Oil cakes are rich in nutrients needed for plant growth such as nitrogen, phosphorus, potassium, and are ideal raw materials for making organic fertilizers. After fermentation treatment, the oil cake can significantly improve the soil structure and increase crop yield.
| Oil cake type | Nitrogen content (%) | Phosphorus content (%) | Potassium content (%) |
|---|---|---|---|
| Soybean oil cake | 6-7 | 1-2 | 1-2 |
| Peanut oil cake | 5-6 | 1-1.5 | 1-1.5 |
| Rapeseed oil cake | 4-5 | 1-2 | 1-2 |
3. Food Processing
Some oil cakes (such as sesame oil cakes and peanut oil cakes) can be used in food processing to make high-protein foods or condiments. For example, sesame oil cakes can be used to make sesame paste or pastry, and peanut oil cakes can be used to make peanut powder.
4. Industrial use
Oil cakes can also be used in industrial fields such as production of biofuels, extraction of plant proteins or as culture media. For example, soybean oil cakes can be used to produce soy protein isolate, and rapeseed oil cakes can be used to produce biodiesel.
3. Precautions for using oil cakes
1.Detoxification treatment: Some oil cakes (such as rapeseed oil cakes) contain anti-nutrition factors or toxins and need to be detoxified before use.
2.Add appropriate amount: When used as feed or fertilizer, the ratio of addition should be controlled according to actual needs to avoid excessive amounts.
3.Storage conditions: The oil cake is prone to mildew and needs to be dried and ventilated. If necessary, add anti-mold agent.
4. The market value of oil cakes
As people pay attention to resource utilization, the market demand for oil cakes has gradually increased. The following is the market price reference for some oil cakes in the near future:
| Oil cake type | Price (yuan/ton) | Main sales areas |
|---|---|---|
| Soybean oil cake | 2500-3000 | North China, East China |
| Peanut oil cake | 3000-3500 | South China, Central China |
| Rapeseed oil cake | 2000-2500 | Southwest and Northwest |
Conclusion
The oil cake after oil pressing is a high-value by-product, which is widely used and economical and environmentally friendly. Through rational use, not only can resource waste be reduced, but it can also provide important raw materials for agriculture, animal husbandry and industry. In the future, with the advancement of technology, the application field of oil cakes will be further expanded.
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